@giovanni: I also like the Modern UI and I do use several of the bundled apps and a few I've downloaded from the marketplace (including Angry Birds Star Wars Edition, obviously).

What I don't like about the Modern UI is the multi-tasking restrictions that have been added to extend tablet battery life, but are also enforced on the desktop! So you can be running on a quad core machine, but only be doing one thing at a time ...  Perplexed

Herbie